RT Journal Article SR Electronic T1 A defence of the potential future of value theory JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 198 OP 201 DO 10.1136/jme.28.3.198 VO 28 IS 3 A1 D Marquis YR 2002 UL http://jme.bmj.com/content/28/3/198.abstract AB In this issue of the journal Mark Brown has offered a new argument against my potential future of value theory. I argue that even though the premises of this new argument are far more defensible than the premises of his old argument, the new argument does not show that the potential future of value theory of the wrongness of killing is false. If the considerations to which Brown appeals are used, not to show that the potential future of value theory is false, but to show that abortion is morally permissible, they are also unsuccessful. I also argue that Brown's clarified self-represented future of value account and Simon Parsons's account of the wrongness of killing are both subject to major difficulties. Finally, I show, in an appendix, that Brown's assertion that my discussion of his views suffers from major logical errors is false.